WO2023145277A1 - Bloc-batterie - Google Patents

Bloc-batterie Download PDF

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Publication number
WO2023145277A1
WO2023145277A1 PCT/JP2022/045516 JP2022045516W WO2023145277A1 WO 2023145277 A1 WO2023145277 A1 WO 2023145277A1 JP 2022045516 W JP2022045516 W JP 2022045516W WO 2023145277 A1 WO2023145277 A1 WO 2023145277A1
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WO
WIPO (PCT)
Prior art keywords
battery pack
housing
case
hole
secondary battery
Prior art date
Application number
PCT/JP2022/045516
Other languages
English (en)
Japanese (ja)
Inventor
憲作 竹田
健明 若林
Original Assignee
パナソニックエナジ－株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by パナソニックエナジ－株式会社 filed Critical パナソニックエナジ－株式会社
Publication of WO2023145277A1 publication Critical patent/WO2023145277A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/222—Inorganic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/218—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material
    • H01M50/22—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the material of the casings or racks
    • H01M50/222—Inorganic material
    • H01M50/224—Metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/35—Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
    • H01M50/367—Internal gas exhaust passages forming part of the battery cover or case; Double cover vent systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/383—Flame arresting or ignition-preventing means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present disclosure relates to battery packs.
  • Battery packs in which a large number of secondary battery cells are connected in series and in parallel, can be used as a power source for portable electric devices such as electric cleaners and power tools, or as a backup power source for servers for stationary power storage applications, as well as for household use. It is used as a power source for offices and factories, as well as a power source for driving assisted bicycles, electric scooters, electric carts, and power sources for driving vehicles such as hybrid vehicles and electric vehicles (for example, Patent Document 1 , 2).
  • Such a battery pack is often formed by forming an outer case in the shape of a box, which constitutes the outer shape of the battery pack.
  • a box-shaped exterior case is often divided into upper and lower halves.
  • lithium-ion secondary batteries are generally used for the secondary battery cells used in battery packs. Can lead to safety events. If an unsafe event occurs in the battery pack, ignition from internal secondary battery cells may be released to the outside of the battery pack.
  • a battery pack according to one embodiment of the present disclosure is divided into one or more secondary battery cells having a surface provided with a safety valve, and a first case and a second case that house the one or more secondary battery cells.
  • a battery pack comprising: a housing; and a fireproof plate disposed inside the housing on a surface facing the surface of the one or more secondary battery cells, wherein the housing comprises the fireproof plate.
  • a part line that joins the first case and the second case by providing a hole region with a plurality of first through holes on a pair of side surfaces that intersect with the fireproof plate arrangement surface on which the plate is arranged inside. are positioned midway away from the corners on the refractory board placement surface and positioned around the perforated area on the pair of side surfaces.
  • This battery pack can prevent flames from leaking outside in an emergency.
  • FIG. 1 is a perspective view showing a battery pack according to one embodiment of the present disclosure.
  • FIG. 2 is an exploded perspective view of the battery pack of FIG. 1 with the label removed.
  • FIG. 3 is a side view showing a state in which the first case and the second case of the battery pack of FIG. 2 are disassembled.
  • 4 is an exploded perspective view of the battery pack of FIG. 1.
  • FIG. 5 is an exploded perspective view of the battery pack of FIG. 4 with the battery holder further exploded.
  • FIG. 6 is a vertical sectional view of the battery pack of FIG. 1 taken along the line VI-VI.
  • FIG. 7 is a horizontal cross-sectional view of the battery pack of FIG. 1 taken along line VII-VII.
  • 8 is a perspective view of a battery pack according to Comparative Example 1.
  • FIG. 9 is a perspective view of a battery pack according to Comparative Example 2.
  • FIG. 9 is a perspective view of a battery pack according to Comparative Example 2.
  • a battery pack according to one embodiment of the present disclosure is divided into one or more secondary battery cells having a surface provided with a safety valve, and a first case and a second case that house the one or more secondary battery cells.
  • a battery pack comprising: a housing; and a fireproof plate disposed inside the housing on a surface facing the surface of the one or more secondary battery cells, wherein the housing comprises the fireproof plate.
  • a part line that joins the first case and the second case by providing a hole region with a plurality of first through holes on a pair of side surfaces that intersect with the fireproof plate arrangement surface on which the plate is arranged inside. are positioned midway away from the corners on the refractory board placement surface and positioned around the perforated area on the pair of side surfaces.
  • the hole region may be provided in the second case.
  • a power supply device may be such that the hole region is arranged on the one side surface with a margin provided around the hole region.
  • the power supply device is such that the part line is linear on the fireproof plate arrangement surface, and the pair of side surfaces is a convex shape continuous from the linear shape. It may be bent to.
  • the part line may be positioned at the center in the vertical direction on the fireproof plate arrangement surface.
  • a power supply device in any one of the above aspects, further includes a pair of penetrating plates arranged inside the housing so as to be spaced apart from the pair of side surfaces. good too.
  • the penetration plate penetrates a plurality of second through holes, and each of the second through holes is the first through hole. They may be staggered.
  • the penetrating plate may be a metal plate.
  • a power supply device in any one of the aspects described above, may further include a label arranged to overlap the hole region on the pair of side surfaces.
  • a power supply device in any one of the above aspects, may further include a battery holder that holds the one or more secondary battery cells.
  • the fireproof plate may be made of mica.
  • each element that constitutes the present disclosure may be a mode in which a plurality of elements are composed of the same member and one member serves as a plurality of elements, or conversely, the function of one member may be performed by a plurality of members. It can also be realized by sharing.
  • the battery pack of the present disclosure can be used as a power source for portable electric devices such as electric cleaners and power tools, or as a backup power source for servers for stationary power storage, or as a power source for home, business, and factory use. Furthermore, it can be used as a power source for driving an assisted bicycle, an electric scooter, an electric cart, or a power source for driving a vehicle such as a hybrid vehicle or an electric vehicle.
  • a battery pack used as a power source for a portable electric device will be described below as an embodiment of the present disclosure.
  • FIG. 1 is a perspective view showing a battery pack 100 according to an embodiment of the present disclosure
  • FIG. 2 is an exploded perspective view showing a state in which the label 50 is removed from the battery pack 100 in FIG. 1
  • FIG. 2 is an exploded side view of the first case 21A and the second case 21B of the battery pack 100
  • FIG. 4 is an exploded perspective view of the battery pack 100 of FIG.
  • FIG. 6 is a vertical cross-sectional view of the battery pack 100 of FIG. 1 taken along line VI-VI
  • FIG. 7 is a horizontal cross-sectional view of the battery pack 100 of FIG. each shown.
  • a battery pack 100 shown in these figures includes one or more secondary battery cells 1 , a housing 20 and a fireproof plate 40 .
  • Each of the one or more secondary battery cells 1 has a surface 1a provided with a safety valve.
  • the surface 1a is preferably a terminal surface on which an electrode terminal such as a positive electrode is provided.
  • the housing 20 houses one or more secondary battery cells 1 . Further, the housing 20 is divided into a first case 21A and a second case 21B as shown in FIGS. A seam where the joint surfaces or mating surfaces of the first case 21A and the second case 21B appear on the outer case surface is called a part line PL. Furthermore, as shown in FIGS. 4 and 5, the housing 20 has a plurality of first through holes 25 formed in a pair of side surfaces 23 intersecting with a fireproof plate arrangement surface 22 in which fireproof plates 40 are arranged. A perforated area 24 is provided.
  • the fireproof plate 40 is arranged inside the housing 20 on a surface facing the surface 1a.
  • a part line PL that joins the first case 21A and the second case 21B is located in the middle of the fireproof plate placement surface 22 away from the corners.
  • the part line PL is positioned around the hole region 24 on the pair of side surfaces 23 . In this way, by separating the part line PL that divides the housing 20 from the corner of the exterior case, even if the inside of the battery pack 100 becomes high pressure, the housing 20 will be pushed down by the high-pressure gas that gathers in the corner. By not allowing the part line PL to cross the hole region 24 while reducing the risk of breakage, there is an advantage that the risk of breakage when the internal high pressure gas is discharged through the hole region 24 can also be reduced.
  • the battery pack 800 shown in FIG. 8 is configured such that the part line PL, which is the seam of the exterior case, divides the smoke exhaust portion 824, the part line PL may collapse due to the internal pressure. (site indicated by x in FIG. 8). In order to prevent this, it is conceivable to integrally mold the material forming the flame discharge portion 824 . In other words, the part line PL cannot be provided in the flame exhaust portion.
  • the part line PL is moved above the exterior case 920 as in the battery pack 900 shown in FIG.
  • the heat energy that convects inside the exterior case 920 tends to concentrate on the corners where there is no escape. Therefore, if the part line PL is provided near the corner, the exterior case 920 may be broken at the part line PL (the portion indicated by x in FIG. 9), and leak fire may occur from this point.
  • a safety valve is often provided on the electrode terminal, although it is common to provide an electrode terminal on the end surface of the outer can.
  • the secondary battery cell is arranged in the exterior case so that the end face of the exterior can is positioned on the end face side in the longitudinal direction of the exterior case. For this reason, when the internal pressure of the secondary battery cell rises, the safety valve opens and high-temperature and high-pressure gas is injected into the inside of the end face side of the exterior case, so that it is directly exposed to high-temperature and high-pressure. Concentrated high-temperature, high-pressure gas tends to increase the pressure even further, and a part line at this location also increases the risk of rupture. A similar phenomenon can also occur if the part line is moved downward. In this way, if the part line is provided in the center, leakage fire may occur from the side surface, and if it is moved to the upper or lower part, leakage fire may occur from the end surface.
  • the present inventors investigated a battery pack configured to prevent leakage fire from the side and end surfaces of the housing.
  • the inventors came up with the idea of a battery pack with a new configuration that can effectively suppress leakage fire. Details will be described below.
  • a battery pack 100 shown in FIGS. 1 to 7 includes a battery holder 10, a housing 20, a pair of fireproof plates 40, and a pair of penetrating plates 30.
  • the housing 20 accommodates the battery holder 10 therein.
  • Label 50 A label 50 is attached to the side surface 23 of the housing 20 .
  • a label 50 is positioned overlying the hole area 24 .
  • the label 50 By closing the first through hole 25 with the label 50 , foreign matter is prevented from entering the housing 20 through the first through hole 25 .
  • the label 50 is broken by the high pressure inside the housing 20 and the first through hole 25 is opened to the outside. Gas can be discharged to the outside of the housing 20 .
  • On the surface of the label 50 information, a logo, etc. of the housing 20 may be printed as appropriate.
  • Such a label 50 is preferably made of a sheet made of paper or the like, which can be broken under high pressure.
  • each label 50 is attached by bending from the upper surface of the housing 20 to the side surface 23 .
  • a single label may be attached by being bent in a U shape so as to cover the left and right side surfaces of the housing.
  • a housing 20 that houses the battery holder 10 is formed in a box shape. In the example shown in FIGS. 1 and 2, it is formed in a rectangular parallelepiped shape elongated in one direction, but it may be formed in a cubic shape.
  • a rectangular parallelepiped shape elongated in the direction of the outer can of the secondary battery cell 1 is used. is formed in
  • the housing 20 is divided into two, a first case 21A and a second case 21B, and the battery holders 10 are accommodated by sandwiching the battery holders 10 from above and below.
  • a dividing direction D21 that divides the housing 20 into the first case 21A and the second case 21B intersects the dividing direction D11 that divides the battery holder 10 into the sub-holders 11A and 11B by 90°, thereby enhancing resistance to impact. be able to.
  • Each of the first case 21A and the second case 21B is made of a material having excellent insulating properties, for example, a resin such as polycarbonate or ABS. Further, the first case 21A and the second case 21B are fixed by screwing bolts 14 or the like at four corners in plan view.
  • first case 21A, second case 21B In this housing 20, the first case 21A and the second case 21B are not symmetrical, but asymmetrical. That is, on the side surface 23 of the housing 20, the first case 21A has a shape in which the intermediate portion is greatly hollowed out, while the second case 21B has a shape that protrudes accordingly. Specifically, the part line PL, which is the seam between the first case 21A and the second case 21B, is midway in the height direction on the end face of the housing 20 as shown in FIGS. As shown in FIG. 3 and the like, the side surface 23 of 20 has a trapezoidal shape in which the middle portion is bent toward the upper surface side while the end portion is in the height direction.
  • the hole region 24 is exposed to the high-pressure gas. Reduces the risk of breakage when
  • a hole region 24 is formed in each of the pair of side walls of the second case 21B.
  • Each hole area 24 is an area in which a plurality of first through holes 25 are opened at a constant pitch. If the first through hole 25 is too large, the flame may escape from the hole area 24 because the temperature of the high temperature and high pressure gas is not sufficiently cooled in the first through hole 25 . On the other hand, if the first through-holes 25 are too small, or if the number of the first through-holes 25 is too small, the pressure of the high-temperature and high-pressure gas cannot be quickly released to the outside of the housing 20, and the internal pressure increases, increasing the risk of fracture.
  • the size and number of the first through holes 25, that is, the total opening area, depends on the performance and number of the secondary battery cells 1 to be used, the pressure of the assumed high pressure gas, the strength of the housing 20, etc. It is adjusted to a value that can discharge high-pressure gas within a certain period of time.
  • the opening diameter of the first through hole 25 is, for example, ⁇ 0.5 mm to 2 mm, preferably ⁇ 1 mm.
  • the hole region 24 is formed integrally with the second case 21B. As a result, it is possible to avoid the formation of a seam, that is, a part line by forming the hole region 24 with a separate member, and to avoid the situation where leakage fire occurs from this part line.
  • the hole area 24 is arranged on each side 23 with a margin around the hole area 24 . Using this margin area, the position of the part line PL is changed from the central portion to the upper surface side. In other words, by providing the hole region 24 in the central portion of the side surface 23 of the housing 20 and by aligning the part line PL along the upper side of the hole region 24, the part line PL is prevented from crossing the middle of the hole region 24. , the hole region 24 is formed integrally with the second case 21B to ensure strength. On the other hand, when the part line PL approaches the corner, there is a risk that the part line PL is broken by the pressure of the high-temperature, high-pressure gas concentrated on the corner.
  • the part line PL is positioned at the center in the height direction on the end face side, that is, the fireproof plate arrangement surface 22 .
  • a margin area is used to continue the part line PL from the end surface of the housing 20 to the side surface 23 . That is, the part line PL positioned at the center in the height direction of the end face side of the housing 20 is horizontally maintained at the center for the margin from the end on the side surface 23 of the housing 20, and the hole area 24 side is maintained. It is bent upwards along the sides and extended horizontally again at the top of the hole area 24 .
  • the width of the margins M1 provided above and below the hole region 24 and the width of the margins M2 provided on the left and right may be different.
  • the width of each of the left and right margins M2 is wider than the width of each of the upper and lower margins M1.
  • the high-pressure gas concentrated in the corners of the housing 20 reaches the hole region 24, that is, between the left and right margins M2.
  • the high pressure gas is discharged to the outside through the first through hole 25, and the pressure decreases, so even if the part line PL is brought close to the corner, It can suppress intense concerns.
  • the upper and lower margins M1 are 5% to 15% of the height of the housing 20, and the left and right margins M2 are 10% to 20% of the length of the housing 20, respectively.
  • Part line PL In the example shown in FIG. 3 and the like, the part line PL is straight on the fireproof plate arrangement surface 22 and bent into a continuous convex shape on the side surface 23 . Moreover, the part line PL on the end surface of the housing 20 is preferably positioned at the center in the vertical direction, which is the dividing direction D21. On the other hand, on the side surface 23 of the housing 20, it is preferable to change the part line PL from the center position in the vertical direction to an isosceles trapezoidal shape.
  • the fireproof board 40 is arranged on the fireproof board placement surface 22 inside the housing 20 .
  • the fireproof plate placement surface 22 is a surface of the inner surface of the housing 20 that faces the surface 1a of the secondary battery cell 1, that is, the terminal surface.
  • the fireproof plate placement surface 22 is the inner surface side of the pair of front and rear end surfaces of the housing 20 .
  • the fireproof board 40 is each arrange
  • the fireproof plate may be arranged only on the terminal surfaces, that is, only on one surface of the battery block.
  • Each fireproof board 40 is formed in a size that matches the fireproof board placement surface 22 on the inner surface of the housing 20 . Moreover, it is formed in a plate shape having a substantially constant thickness.
  • the fireproof plate 40 is made of a fire-resistant and flame-resistant material, preferably an inorganic material such as a mineral material such as mica. Mica is highly flame-retardant and non-combustible, has excellent insulating properties, is relatively inexpensive, and is suitable as a member that requires heat resistance and insulating properties.
  • the fireproof plate 40 which has excellent heat resistance, does not burn or melt even when exposed to high-temperature exhaust gases or flames emitted from the battery cells 1, and prevents the exhaust gases and flames from passing through the heat-resistant wall and penetrating the exterior case. can.
  • the material of the fire-resistant plate 40 is a heat-resistant plate that is not melted by the exhaust gas injected from the exhaust valve.
  • Inorganic plates in which inorganic fibers are aggregated in the form of sheets or plates, and heat-resistant plates in which inorganic fibers are embedded in plastic can be used.
  • a mica plate, an inorganic plate formed by molding an inorganic material into a plate shape, or a metal plate can also be used.
  • plastics with excellent heat resistance properties such as thermoplastic resins such as nylon resin and fluororesin, can be used in position.
  • Molded heat-resistant plates, and heat-resistant plates formed by molding plastics having excellent heat resistance properties such as silicon resin and polyimide resin into a plate shape can also be used.
  • Penetrating plates 30 are provided inside the pair of side surfaces 23 of the housing 20, respectively. Each penetrating plate 30 has a plate shape formed along the hole region 24 . Such a penetrating plate 30 is made of a material having heat resistance and rigidity. A metal plate of aluminum, copper, stainless steel, or the like is preferable.
  • Second through holes 35 are formed in the pair of through plates 30, respectively.
  • the first through hole 25 and the second through hole 35 are offset from each other as shown in the vertical cross-sectional view of FIG. 6 and the horizontal cross-sectional view of FIG. In other words, the opening portions of the first through hole 25 and the second through hole 35 do not overlap. In the embodiment, the opening portions of the first through hole 25 and the second through hole 35 do not overlap when viewed in a direction perpendicular to the side surface 23 of the housing 20 .
  • a gap 30 ⁇ /b>A is provided between the side surface 23 of the second case 21 ⁇ /b>B of the housing 20 and the penetrating plate 30 .
  • the penetrating plates 30 are arranged overlapping the hole regions 24 on the side surfaces 23 of the housing 20, and the second through holes 35 are arranged in each penetrating plate 30 so as to be displaced from the first through holes 25. So, even if one of the secondary battery cells 1 housed inside the battery pack 100 catches fire, the flame first hits the side surface 23 of the housing 20 through the second through hole 35. It is possible to effectively suppress the direct leakage to the outside of the battery pack 100 . At the same time, gas generated inside the housing 20 is discharged to the outside of the housing 20 via the second through hole 35 , the gap 30 ⁇ /b>A, and the first through hole 25 .
  • the pitch of the first through-holes 25 and the pitch of the second through-holes 35 be the same.
  • the pitch at which the first through holes 25 are provided is 3 mm to 6 mm, preferably 5 mm.
  • the opening diameter of the second through-hole 35 is the same as that of the first through-hole 25 .
  • the battery holder 10 is formed to have an outer shape one size smaller than the inner shape of the housing 20 so as to be accommodated inside the housing 20 .
  • a plurality of protrusions 12 are formed on the surface. Each protrusion 12 protrudes from the surface of the battery holder 10 toward the inner surface of the housing 20 when the battery holder 10 is housed in the housing 20 .
  • a total of four projections 12 are formed at each of the four corners of the battery holder 10 .
  • Each protrusion 12 is formed integrally with the battery holder 10 .
  • FIG. 10 An exploded perspective view of the battery holder 10 is shown in g.
  • This battery holder 10 holds the secondary battery cell 1 and the substrate 60 .
  • the battery holder 10 in which the secondary battery cell 1 and the substrate 60 are set forms a core pack.
  • the substrate 60 is placed and fixed on one surface (the upper surface in the example of FIG. 5) of the battery holder 10 .
  • the battery holder 10 holds a plurality of secondary battery cells 1 .
  • the battery holder 10 is divided into two sub-holders 11A and 11B, which sandwich and hold a plurality of secondary battery cells 1 in the longitudinal direction.
  • the sub-holder 11A forms a cylindrical housing space 13 for housing the secondary battery cell 1 .
  • FIG. 11A forms a cylindrical housing space 13 for housing the secondary battery cell 1 .
  • the number of secondary battery cells and the stacking method are not limited to this configuration, and 3 or less, or 5 or more may be held.
  • the number of secondary battery cells is not limited to two, and one level, that is, all the secondary battery cells may be arranged on the same plane, or three or more levels may be stacked. In addition to arranging them in a matrix, they may be arranged in a zigzag manner so that each stage is alternate. For example, the thickness of the battery holder can be reduced by arranging the storage space in two stages and offsetting the center of the cylinder of the storage space between the upper and lower stages. Furthermore, a plurality of secondary battery cells may be connected in the longitudinal direction.
  • a plurality of secondary battery cells can be connected and held in the length direction in one battery holder, or by connecting a plurality of battery holders, a secondary battery cell can be obtained as a result. It is also possible to adopt a form in which a plurality of secondary battery cells are connected in the length direction. In this way, the form and number of battery holders holding the secondary battery cells or the number of battery holders are appropriately designed according to the number of secondary battery cells determined according to the voltage and capacity required for the battery pack. .
  • the battery holder 10 is made of a material having excellent insulation and heat resistance, such as polycarbonate ABC resin.
  • Each secondary battery cell 1 is a cylindrical secondary battery cell having a cylindrical exterior can. Cylindrical secondary battery cells have terminal faces on both end faces. A safety valve is provided on one terminal surface. The safety valve is a member that opens when the internal pressure of the outer can rises to release the internal gas. Although the safety valve is generally provided on the positive electrode side, the present disclosure does not specify the position where the safety valve is provided on the positive electrode side, and may be provided on another position, for example, the negative electrode side.
  • a cylindrical lithium ion secondary battery can be suitably used for such a secondary battery cell 1 .
  • secondary battery cells are not specified as cylindrical batteries, nor are they specified as lithium ion secondary batteries.
  • Any rechargeable battery such as a nickel-metal hydride battery or a nickel-cadmium battery, can be used as the secondary battery cell.
  • a lead plate is fixed to the end face of the secondary battery cell 1 .
  • a plurality of secondary battery cells 1 are connected in series or in parallel via lead plates.
  • the example of FIG. 5 shows an example in which four secondary battery cells 1 are connected in series, that is, in four series, but they may be connected in two series and two parallel or four series.
  • the lead plate is made of a metal plate and welded to the secondary battery cell 1 .
  • a lead positioning guide is formed along the outer shape of the lead plate on the inner surface of the battery holder 10 so as to position the lead plate at a predetermined position. Note that the lead plate may be arranged on the outer surface side of the battery holder instead of the inner surface side.
  • the lead plate is fixed to the terminal surface of the secondary battery cell exposed from the battery holder.
  • the output of the battery block 1 c composed of the secondary battery cells 1 connected in series or in parallel via lead plates is output from the battery pack 100 .
  • the upper surface of the battery holder 10 is used as a mounting surface on which the substrate 60 is mounted.
  • a frame for holding the substrate 60 may be formed on the mounting surface.
  • a separate substrate holder for holding the substrate may be provided.
  • the substrate 60 has electronic circuits such as a voltage detection circuit that detects the total potential of the battery assembly in which the secondary battery cells 1 are connected in series or in parallel, an intermediate potential, a control circuit that controls charging and discharging, and a safety circuit. Implemented.
  • the substrate 60 is formed in a rectangular shape.
  • a battery pack according to the present disclosure can be suitably used as a power source for portable electric devices such as electric cleaners and power tools. It can also be used as appropriate for applications such as a power supply device for mobile objects such as assisted bicycles and electric carts.
  • Battery pack 100 Battery pack 1 Secondary battery cell 1c Battery block 10 Battery holders 11A, 11B Sub-holder 12 Protrusion 13 Storage space 14 Bolt 20 Housing 21A First case 21B Second case 22 Fireproof plate arrangement surface 23 Side surface 24 Hole region 25 First Through hole 30 Penetrating plate 35 Second through hole 40 Fireproof plate 50 Label 60 Board 800 Battery pack 820 Exterior case 824 Flame vent 825 Flame extinguishing hole 900 Battery pack 920 Exterior case 924 Flame vent 925 Extinguishing hole PL Part line M1 Margin M2 Margin

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

L'invention concerne un bloc-batterie comprenant : un ou plusieurs éléments de batterie secondaire ayant une surface pourvue d'une soupape de sécurité; un compartiment divisé en un premier compartiment et un second compartiment, pour stocker l'un ou plusieurs éléments de batterie secondaire; et une plaque ignifuge placée à l'intérieur du compartiment, sur une surface qui fait face à ladite surface de l'élément de batterie secondaire. Le compartiment comporte une région de trou dans laquelle une pluralité de premiers trous traversants sont ouverts, dans une paire de surfaces latérales qui sont orthogonales à une surface de placement de plaque ignifuge à l'intérieur de laquelle la plaque ignifuge est placée, des deux côtés de la surface de placement de plaque ignifuge. Une ligne de séparation qui relie le premier compartiment et le second compartiment est positionnée au centre à distance des coins dans la surface de placement de plaque ignifuge, et est positionnée à la périphérie de la région de trou dans la paire de surfaces latérales.
PCT/JP2022/045516 2022-01-27 2022-12-09 Bloc-batterie WO2023145277A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022-010610 2022-01-27
JP2022010610 2022-01-27

Publications (1)

Publication Number Publication Date
WO2023145277A1 true WO2023145277A1 (fr) 2023-08-03

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PCT/JP2022/045516 WO2023145277A1 (fr) 2022-01-27 2022-12-09 Bloc-batterie

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Country Link
WO (1) WO2023145277A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016136193A1 (fr) * 2015-02-25 2016-09-01 パナソニックＩｐマネジメント株式会社 Support de piles
JP2018073561A (ja) * 2016-10-26 2018-05-10 三洋電機株式会社 電源装置
JP2019029086A (ja) * 2017-07-26 2019-02-21 三洋電機株式会社 電池パック
WO2020152992A1 (fr) * 2019-01-25 2020-07-30 三洋電機株式会社 Bloc-batterie

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016136193A1 (fr) * 2015-02-25 2016-09-01 パナソニックＩｐマネジメント株式会社 Support de piles
JP2018073561A (ja) * 2016-10-26 2018-05-10 三洋電機株式会社 電源装置
JP2019029086A (ja) * 2017-07-26 2019-02-21 三洋電機株式会社 電池パック
WO2020152992A1 (fr) * 2019-01-25 2020-07-30 三洋電機株式会社 Bloc-batterie

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